MECHANISM OF CO-METABOLISM ENHANCEMENT OF EFFICIENT BIODEGRADATION OF PHENANTHRENE BY PHENOL

LI Shuang; ZHANG Aining; LIU Xingshe; YANG Lu; LIU Yongjun

doi:10.13205/j.hjgc.202307013

Volume 41 Issue 7

Jul. 2023

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2023 > 41(7): 94-101

CAO Lixia, LI Wenshuan, LIN Xin, LI Xiaojun, FU Wanlong. EFFECTS OF SELENIUM APPLICATION ON ARSENIC UPTAKE AND ACCUMULATION IN RICE[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(7): 271-276. doi: 10.13205/j.hjgc.202307036

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LI Shuang, ZHANG Aining, LIU Xingshe, YANG Lu, LIU Yongjun. MECHANISM OF CO-METABOLISM ENHANCEMENT OF EFFICIENT BIODEGRADATION OF PHENANTHRENE BY PHENOL[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(7): 94-101. doi: 10.13205/j.hjgc.202307013

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MECHANISM OF CO-METABOLISM ENHANCEMENT OF EFFICIENT BIODEGRADATION OF PHENANTHRENE BY PHENOL

doi: 10.13205/j.hjgc.202307013

LI Shuang^1,2,
ZHANG Aining^{1,2
,
,},
LIU Xingshe^1,2,
YANG Lu^1,2,
LIU Yongjun^1,2

1. School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China;
2. Key Laboratory of Northwest Water Resources, Environment and Ecology of Ministry of Education, Xi'an 710055, China

Received Date: 2022-08-15

Abstract

Abstract

A strain that could efficiently degrade phenanthrene was isolated from the aerobic sludge. Firstly, the degradation characteristics of phenanthrene with different carbon sources as co-substrates were explored. The results showed that the degradation rate of 30 mg/L phenanthrene reached 95.35% in the co-metabolism system with 80 mg/L phenol as a co-substrate.Compared with the non-co-metabolism system without phenol, the degradation rate of phenanthrene increased by 20.33%, and phenol was also mineralized. The co-metabolism enhancement mechanism of the strain with phenol as a co-substrate was further analyzed based on the cells' physiological response and the related enzymatic expression. It was found that biomass and microbial activity increased significantly, which promoted the secretion of proteins and polysaccharides in extracellular polymeric substances (EPS). And the functional groups of EPS also were changed in the co-metabolism system. In addition, compared with the non-co-metabolism system, the co-metabolism system could advance the expression of dehydrogenase (DHA) activities and dioxygenase (C23O) activities by 12 h, and the activities respectively increased by 0.17 to 3.37 times and 0.84 to 1.71, respectively, times during the degradation process. Therefore, the co-metabolism system with phenol as a co-substrate could effectively improve the degradation rate of phenanthrene, which was of great significance for the efficient degradation of aromatic hydrocarbons.
- phenol,
- phenanthrene,
- biodegradation,
- co-metabolism,
- action mechanism

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References(31)

References

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